Actually, chainsaws, table saws, cars, motorcycles, and even guns all have safety mechanisms installed by the manufacturers and tampering with them voids the warranty.
Nobody is arguing that computers shouldn't have safety mechanisms. But the manufacturers of those devices don't have remote control over what I do with them. There's no equivalent of a "curated App Store" (and one that requires a 30% cut to the manufacturer, which is the real point behind it).
The equivalent would be if you could only use specific brands of replacement chains, blades, tires, or bullets that are approved by the manufacturer, for which the manufacturer gets a cut of the sales of those replacements.
Tampering with safety mechanisms on your car voids the warranty on the safety mechanism, not on your whole car. Otherwise using third party mechanics would be impossible.
